Literature lovers around the world on Friday held celebrations and paid tribute to Anton Chekhov on the 150th birthday of Russia's most universally acclaimed playwright. Chekhov fans said the author famed for combining a raw emotional writing style with detailed studies of the human condition at the turn of the last century maintains his relevance more than 100 years after his death. Russian President Dmitry Medvedev jetted to Chekhov's hometown of Taganrog in southern Russia, where he described the physician-turned-writer's short stories and plays as "immortal." Clutching a bouquet of cream roses, the Kremlin chief said we can still learn...